#!/bin/bash
cp /etc/sysctl.conf /etc/sysctl.conf.bak
echo -e "vm.swappiness = 0
net.ipv4.neigh.default.gc_stale_time=120
net.ipv4.conf.all.rp_filter=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.all.arp_announce=2
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog=8192
net.ipv4.tcp_synack_retries = 2
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv4.conf.lo.arp_announce=2
net.ipv4.tcp_fin_timeout=30

fs.inotify.max_user_watches = 524288
fs.file-max = 131072
" >> /etc/sysctl.conf

echo -e "
* soft     nproc          131072    
* hard     nproc          131072   
* soft     nofile         131072   
* hard     nofile         131072
root soft     nproc          131072    
root hard     nproc          131072   
root soft     nofile         131072   
root hard     nofile         131072
" >> /etc/security/limits.conf
